I don't know about CA but it is a resounding "no" in FL. You can try to impeach the issuing officer with his error but, again in FL, that probably will neither gain you any tactical momentum nor any favor with the court.
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No. It really does not make your speed any slower.
You should be careful about even pointing this out, except as an aside as to his or her attention to detail and how it might be characteristic of his attention to detail to what your speed was.
I would say no. This is a clerical error that is easily remedied. Best to talk to Andrew Roberts or Greg Hill in your area. Both are excellent and offer free consultations. Good luck. Hope this helps?
No, it just makes the ticket or difficult to find within the system. Minor errors of this matter are commonly and routinely fixed at the arraignment.
A proper response would require a thorough investigation into the history and background of this relationship. The information provided above is just that, information, to be used as you see fit.